Where is default androidboot.seralno kernel command line parameter stored?

Products Support HiKey 960
#1

Hello,

I went through the following question:

and understood how to the change the default device id.

But i was curious to find out where in the source is the default device ID stored.

That is, the kernel command line parameter androidboot.serialno=XXXX shows up when I run:

cat /proc/cmdline

but i could not find this to be set in device/linaro/hikey960/BoardConfig.mk

It would be very helpful if someone could tell me where the default device ID is stored ?

Thank you for your time,

Regards,
Nishad

#2

Not totally sure but believe it’s here: Platforms/Hisilicon/HiKey960/HiKey960Dxe/HiKey960Dxe.c - device/linaro/bootloader/OpenPlatformPkg - Git at Google

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#3

Thanks very much for the quick reply.

I will try to modify it an check if it affects the device ID after flashing and post my results.

Thanks again,
Nishad

#4

Before you go mucking around in the source code…

Have you read this?
https://source.android.com/setup/build/devices#960serial

#5

Not sure if I understand the question but what you see is the result of fastboot setting the serial number it have stored in flash as kernel command-line argument.

Why do you not run this once for every board with uniqueue serial-numbers

fastboot getvar nve:SN@123456789012345

Usually when one have to resort to modifying the kernel it is a sign something is not as it should be…

#6

Hello,

Thanks for the reply.
Yes i have gone through this and the same thing is also mentioned in the post i referred to in my first comment.

I just want to make sure this is where the default device ID is stored.

I understand that for such kind of a change it is not recommended to modify the Kernel Source and I would probably use the method you mentioned to modify the device ID.

Thanks again,
Nishad

#7

I carried out some tests and I think It indeed is the place where the “androidboot.serialno” is stored.

Thanks very much. it helped a lot.

Regards,
Nishad

1 Like